Does the Law of Conservation of Energy Always Apply?

As we know that energy can not be create nor destroy it always converted to one form to another form. In this paper I tried to find out such a condition in which there is no energy conservation is apply and output energy is greater than the input energy (theoretically ). In this condition I take a light frame, square in shape with 2 frame and in the middle, there is cylinder (mass =M, Radius =R) which is connected with light rod having radius = 2R (twice of cylinder’s radius but massless). When we allow to
come down at inclined plane, after reaching to the ground it strikes with obstacle ( point “A”) Then due to collision it rotate (conservation of Angular Momentum) and gives more energy than potential energy of the cylinder due to height (h= BC)